import javax.crypto.KeyAgreement;
import javax.crypto.spec.SecretKeySpec;
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.security.PrivateKey;
import java.security.PublicKey;

/**
 * Created by zyl on 17-6-2.
 */
public class KeyAgre {
    public static void main(String args[ ]) throws Exception{
        // 读取对方的DH公钥

        FileInputStream f1=new FileInputStream(args[0]);
        ObjectInputStream b1=new ObjectInputStream(f1);
        PublicKey pbk=(PublicKey)b1.readObject( );
//读取自己的DH私钥

        FileInputStream f2=new FileInputStream(args[1]);
        ObjectInputStream b2=new ObjectInputStream(f2);
        PrivateKey prk=(PrivateKey)b2.readObject( );
        // 执行密钥协定

        KeyAgreement ka=KeyAgreement.getInstance("DH");
        ka.init(prk);
        ka.doPhase(pbk,true);
        //生成共享信息

        byte[ ] sb=ka.generateSecret();
        for(int i=0;i<sb.length;i++){
            System.out.print(sb[i]+",");
        }
        SecretKeySpec k=new  SecretKeySpec(sb,"DESede");
    }

}
